Ministry of Jal Shakti
Filling up of Urban Aquifiers
Central Ground Water Board  generates ground water quality data on a regional scale during various scientific studies and ground water quality monitoring throughout the country. These studies indicate the occurrence of Salinity, Fluoride, Arsenic, Nitrate, Iron and Heavy Metals beyond the Bureau of Indian Standards  permissible limits in isolated pockets in various parts of the country. The ground water contamination reported by CGWB is mostly geogenic in nature and does not show significant change over the years. However, nitrate contamination is mostly anthropogenic and its spread has been notices in some areas, particularly areas adjoining habitations. Nitrate contamination can also be caused by excessive use of fertilizers. High Salinity has been reported from 248 districts in 18 States, Fluoride beyond permissible limit has been encountered from 370 districts in 23 States, Nitrate from 423 districts in 23 States, Arsenic from 152 districts in 21 States, Iron from 341 districts in 27 States, Lead from 92 districts in 14 States, Cadmium from 24 districts in 9 States and Chromium from 29 districts in 10 States. State-wise details of contamination of ground water is given at Annexure-I.
As per the study ‘Reassessment of Water Availability in India using Space Inputs, 2019’ by Central Water Commission , the average annual water resource of all the 20 basins of the country has been assessed as 1999.20 Billion Cubic Meters . The basin-wise water availability and estimated population for the years 2025 and 2050 have been shown in Annexure-II.
Central Pollution Control Board  in association with the State Pollution Control Boards/Committees in different States/Union Territories  have been monitoring the water quality of rivers and other water bodies through a network of monitoring stations under the National Water Quality Monitoring Programme. Based on water quality monitoring results, pollution assessment of rivers has been carried out by CPCB from time to time. As per the last report published by CPCB in September 2018, 351 polluted stretches were identified on 323 rivers based on monitoring results in terms of Bio-chemical Oxygen Demand , an indicator of organic pollution.
Cleaning/rejuvenation of rivers is a continuous process. It is the responsibility of the States/UTs, local bodies and industrial units to ensure required treatment of sewage and industrial effluents to the prescribed norms before discharging into river and other water bodies, coastal waters or land to prevent and control of pollution therein. For conservation of rivers, this Ministry has been supplementing efforts of the States/UTs by providing financial and technical assistance for abatement of pollution in identified stretches of rivers in the country through the Central Sector Scheme of Namami Gange for rivers in Ganga basin and the Centrally Sponsored Scheme of National River Conservation Plan  for other rivers.
Proposals for pollution abatement works in the towns along polluted river stretches are received from the States/UTs from time to time for consideration under NRCP and sanctioned based on their prioritization, conformity with NRCP guidelines, availability of plan funds, etc. NRCP has so far covered polluted stretches on 34 rivers in 77 towns spread over 16 States in the country with the project sanctioned cost of Rs.6050.18 crore, and inter-alia, a sewage treatment capacity of 2677 million litres per day  has been created. Under Namami Gange programme, a total of 36 projects, including 160 projects for sewage treatment of 5024 mld and sewer network of 5227 kms., have been sanctioned at a cost of Rs.30853 crore.
In addition, sewerage infrastructure is created under programs like Atal Mission for Rejuvenation & Urban Transformation  and Smart Cities Mission of Ministry of Housing & Urban Affairs.
As per the Provisions of Environment  Act, 1986 and Water , Act 1974, industrial units are required to install effluent treatment plants  and treat their effluents to comply with stipulated environmental standards before discharging into river and water bodies. Accordingly, CPCB, State Pollution Control Boards/Pollution Control Committees monitor industries with respect to effluent discharge standards and take action for non-compliance under provisions of these Acts.
Besides, in compliance of the orders of National Green Tribunal  in Original Application No.673/2018 regarding rejuvenation of polluted river stretches in the country, States/UTs are required to implement approved action plans for restoration of the polluted stretches in their jurisdiction as identified by CPCB and published in their report of 2018, within the stipulated timelines. As per the orders of NGT, regular review on implementation of action plans is undertaken in the States/UTs and also at Central level.
This Information was given by the Minister of State for Jal Shakti, Shri Bishweswar Tudu in a written reply in Lok Sabha today.